There are many factors that can affect a person's chance of developing lung cancer, but the one we know the most about is cigarette smoking.
If you smoke now or did smoke in the past, you may be at increased risk for lung cancer. Screening with low-dose CT scanning to find lung cancer early is available for people who meet certain criteria developed by the US Preventive Services Task Force (USPSTF).
Smoking is not the only risk factor for lung cancer, so you should discuss your personal risk with your doctor.
Medicare and many other insurers will cover the cost of screening with low-dose CT scanning for people who meet the USPSTF criteria.